I have done that multiple times i am wondering if any of my other mods could be interfering with it i have made a folder in my arma 2 directory named @mcc_sandbox->Addons and then i put the all of the .pbo files in their and the .bikey file in the keys folder and then added the " -mod=@mcc_sandbox info into my launcher ( i also have dozens of other mods in there ) when i start the game i did what you said and previewed the game but nothing happends